Personalised Diwali Greeting Card using Nano Banana

This October is all about one of the biggest Hindu festivals of the year. With Diwali or Deepavali just a couple of weeks away, businesses are gearing up for year-high sales, offices are readying for an extended vacation, and regular folks like you and me are getting busy with preparations for the festival. One important task among the long list is making a Diwali greeting card to share the festivities with your peers. So, how about we use yet another buzzword these days to cater to the trending festivities – AI for Diwali wishes.

Nano Banana has been all over the internet recently for its fantastic image outputs. The latest AI image generation tool by Google has managed to turn everyone into a 3D figurine, a retro-superstar, or even a royal, with its mind-blowing image editing capabilities. Here, let us attempt to utilise the same capabilities for the perfect Diwali greetings card, your style!

Before we proceed, here is all you need to know about Nano Banana, the AI tool we will be using for this process.

Nano Banana: The AI Image-Editor Like None Other

Nano Banana is the latest image generation model from the house of Google. It comes as a part of its Gemini 2.5 Flash AI model, and other than image generation, is globally popular for its image “editing” capabilities. Why? It can blend multiple images into a single image, change backgrounds, attire, and even perform other editing tasks on an image.

We even compared the Nano Banana with GPT-5 for both of their image generational capabilities. You can check out the comparison here.

How Does It Work?

Here’s what happens behind the scenes when you create your personalised Diwali greeting card with Nano Banana:

• Upload & Detect: You upload a photo, and the AI detects your face using landmark mapping to capture expressions and proportions accurately.
• Style Transformation: Nano Banana’s diffusion model redraws your face in the selected Diwali art style while keeping your identity intact.
• Scene Blending: The system adjusts lighting, shadows, and colours to match festive backgrounds like diyas, rangolis, or fireworks.
• Prompt Magic: Add prompts such as “golden glow” or “traditional attire” – the AI adapts textures and ambience through natural language cues.
• Final Touches: A post-processing layer enhances clarity, balance, and resolution, giving you a polished, ready-to-share Diwali greeting.

In essence, Nano Banana merges portrait realism with festive artistry, turning a simple image into a vibrant, personalised Diwali card powered by AI.

Now that we know what happens behind the scenes, let’s get to making our very own, personalised Diwali wishing card.

How to Create Your Own Diwali Greetings Card

1. Go to the Google Gemini website or open the Gemini app on your phone.
2. From the dropdown menu on the top-left, select the 2.5 Flash model.
3. In the prompt window, click on “Tools” and select the “Create images” option (one with the banana icon next to it) from the list that appears.
4. Using the “+” icon next to Tools, upload your headshot or selfie.
5. Use any of the prompts from below.

Press Enter and let Nano Banana do its magic. Once the image is ready, you can tweak it further with follow-up prompts, or simply download it by clicking the Download icon on the top-right of the image.

Top Prompts for a Personalised Diwali Greetings Card

Here are some of the best prompts for Nano Banana I have personally tried for a personalised Diwali greeting card.

1. Vibrant Animated Postcard Style

Prompt:

“Make a cartoon/ animation style figure of me within a postcard meant to wish Happy Diwali to my friends. The card is meant to be sent on WhatsApp as a wish to my peers.

Colour the card in vibrant red and gold, with a background depicting various elements of Diwali all across, including Diyas, lights, fireworks and anything else you would like to add. The middle of the card should have the words “Happy Diwali” written in beautiful, bold letters.

Keep the animated image of me on one side of the text. Make sure everything in the card is evenly spaced out and there is not a lot of empty space anywhere”

Output:

Description: A cheerful, animated Diwali postcard bursting with colours, lights, and festive energy. Perfect for sharing on chats.

Best for: Sending fun, eye-catching Diwali greetings to friends and peers on WhatsApp or social media.

2. Traditional Festive Art Style

“Create a semi-realistic illustration of me styled as a traditional Indian painting, dressed in ethnic attire, smiling, and holding a lit diya.
The card should have a royal Diwali theme in shades of deep maroon, saffron, and gold, with motifs like lotus flowers, hanging diyas, and rangoli borders.
Place the text ‘Wishing You a Joyous & Prosperous Diwali’ in elegant calligraphy at the centre.
Keep my image on one side, slightly glowing from the diya light.
Ensure the overall design feels warm, festive, and rich, like a handcrafted greeting with ornate Indian artistry.”

Output:

Description: A regal, hand-painted Diwali greeting that captures the warmth and tradition of Indian festivities.

Best for: Sending elegant, family-oriented wishes with a touch of classic Indian heritage.

3. Modern Minimalist Neon Style

“Design a futuristic Diwali greeting card in neon aesthetic, featuring an animated version of me in a glowing outline style.
Use a dark purple or midnight blue background with minimal yet striking neon effects of diyas, fireworks, and geometric patterns.
Write ‘Happy Diwali 2025’ in bold, neon typography at the centre, balanced with my figure on one side.
Keep the spacing symmetrical, and make sure the composition feels sleek, modern, and perfect for WhatsApp sharing — more like a trendy digital postcard than a traditional one.”

Output:

Description: A vibrant, high-energy Diwali card with neon tones and futuristic glow, perfect for digital sharing.

Best for: Wishing friends, colleagues, or peers in a trendy, modern, and social-media-friendly format.

Conclusion

I have kept this article as simple as possible, for sheer practicality. With these simple prompts and the straightforward process, all it takes is one photo and a few seconds. Once done, you will have your very own, personalised greeting card for Diwali, to share with your loved ones. All thanks to the power of AI and the magic of Nano Banana.

After all, isn’t that what AI is here for – to fast-track the mundane tasks we are burdened with every day? So, as it further advances, we can expect more personalisations and heavy lifting at the hands of AI, rather than humans toiling away hours on such tasks. Until then, let’s make the most of what we have and share the most personalised greetings this Diwali.